diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-11 00:28:20 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-13 01:42:16 +0300 |
| commit | 5314a4996cc76e2a8534c74a66f5181e95ac64fc (patch) | |
| tree | 747e8c5d00b7ee7755bb5f32e1fe009343275bd6 /libavcodec/pnm_parser.c | |
| parent | 6c52c27d3da706ed424d9338c47be497c8d620e8 (diff) | |
avcodec/pnm_parser: Check av_image_get_buffer_size() for failure
Fixes: out of array access
Fixes: 30135/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PBM_fuzzer-4997145650397184
Fixes: 30208/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PGMYUV_fuzzer-5605891665690624.fuzz
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/pnm_parser.c')
| -rw-r--r-- | libavcodec/pnm_parser.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/libavcodec/pnm_parser.c b/libavcodec/pnm_parser.c index d19dbfe98c..f3be6d640c 100644 --- a/libavcodec/pnm_parser.c +++ b/libavcodec/pnm_parser.c @@ -109,8 +109,10 @@ retry: if (next == END_NOT_FOUND) pnmpc->ascii_scan = sync - pnmctx.bytestream + skip; } else { - next = pnmctx.bytestream - pnmctx.bytestream_start + skip - + av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1); + int ret = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1); + next = pnmctx.bytestream - pnmctx.bytestream_start + skip; + if (ret >= 0) + next += ret; } if (next != END_NOT_FOUND && pnmctx.bytestream_start != buf + skip) next -= pc->index; |